Allow re-application of postage
If I generate a label with the incorrect weight on it, for example, I would need to cancel my order, get a refund, and of course re-apply postage to that order with the correct weight.
At the moment, your system assumes that we got it right first time, and so if a postage rate has already been applied to an order, it does not let us apply it again. Ever. I would then need to either use OLP - which you are discontinuing soon - or go to the post office to post it.
Please note I am not talking about re-generation of labels; I am talking about generating a completely new label at a different cost for the same order I have incorrectly generated a label for.